Which of the following items are the main inputs, or reactants, in cellular respiration? Select all correct answers.

A. pyruvate

B. glucose

C. carbon dioxide

D. oxygen

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

Omg substrates with the same size and shape as the active site will bind to the enzyme. why is the key labeled the “bad” substrate?

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?